I stumbled upon this card today going through some old stuff. It's a 1993 Topps Shaquille O'Neal but the back is of Rex Walters. I did a little research on it with not much luck. I saw a couple of eBay listings but that was it. Does anyone have any information on this card? Is it rare? Just wondering what it's all about because I could find no information on the Internet whatsoever. Any help is appreciated! Thanks!